"However I now have a son of Jewish ethnicity and he is having numerous foreskin issues. "
A lot of this could be due to ignorance of penis health especially as foreskin issues used to be routinely written off as needing a circumcision.
Foreskins need to be retracted regularly to be cleaned underneath. This isn't usually possible until age 5+ and even at that age that can be adhesions which will be loosened over time.
If the for skin is not retracted regularly by the time puberty and erections hit the penis develops and grows but the foreskin will not be stretched /develop and neither will the frenulum.